I also completely redesigned the "Formats" box and made icons to depict each kind of format that the book may be available in. I combined that with a couple of other sections that were related to prices and formats, and saved quite a bit of space. The icons also make it a little more enticing to check out the different formats. The live version of the page could have tooltips for each icon as you hover over it, to display the format name. 

I grouped similar information into tabbed boxes. For example, all of the cross-sell and upsell products ("Customers also bought," "Frequently bought together," etc.) are in one box with tabs for each section. The tabs may cycle through every 15 seconds or so, to give the user a preview of what is on each tab, without taking as much vertical space as those products would if they were all displayed at once.